Update runtime files.
diff --git a/runtime/syntax/haml.vim b/runtime/syntax/haml.vim
index 5369695..c14b88f 100644
--- a/runtime/syntax/haml.vim
+++ b/runtime/syntax/haml.vim
@@ -2,7 +2,7 @@
" Language: Haml
" Maintainer: Tim Pope <vimNOSPAM@tpope.org>
" Filenames: *.haml
-" Last Change: 2016 Aug 29
+" Last Change: 2019 Dec 05
if exists("b:current_syntax")
finish
@@ -38,7 +38,7 @@
syn match hamlSelfCloser "/" contained
syn match hamlClassChar "\." contained nextgroup=hamlClass
syn match hamlIdChar "#{\@!" contained nextgroup=hamlId
-syn match hamlClass "\%(\w\|-\)\+" contained nextgroup=@hamlComponent
+syn match hamlClass "\%(\w\|-\|\:\)\+" contained nextgroup=@hamlComponent
syn match hamlId "\%(\w\|-\)\+" contained nextgroup=@hamlComponent
syn region hamlDocType start="^\s*!!!" end="$"